<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>标题标记的使用</title>
	</head>
	<body>
		<h1>1级标题</h1>
		<h2>2级标题</h2>
		<h3>3级标题</h3>
		<h4>4级标题</h4>
		<h5>5级标题</h5>
		<h6>6级标题</h6>
		<h7>7级标题</h7>
	</body>
</html>
